791015625 has 55 divisors (see below), whose sum is σ = 1477050751. Its totient is φ = 421875000.

The previous prime is 791015611. The next prime is 791015639. The reversal of 791015625 is 526510197.

The square root of 791015625 is 28125.

It is a perfect power (a square), and thus also a powerful number.

791015625 is a `hidden beast` number, since 7 + 9 + 10 + 15 + 625 = 666.

It is an interprime number because it is at equal distance from previous prime (791015611) and next prime (791015639).

It can be written as a sum of positive squares in 5 ways, for example, as 4549689 + 786465936 = 2133^2 + 28044^2 .

It is not a de Polignac number, because 791015625 - 2²⁵ = 757461193 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 791015625.

It is an unprimeable number.

It is a polite number, since it can be written in 54 ways as a sum of consecutive naturals, for example, 158203123 + ... + 158203127.

Almost surely, 2^791015625 is an apocalyptic number.

791015625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

791015625 is the 28125-th square number.

791015625 is the 14063-rd centered octagonal number.

It is an amenable number.

791015625 is a deficient number, since it is larger than the sum of its proper divisors (686035126).

791015625 is an frugal number, since it uses more digits than its factorization.

791015625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62 (or 8 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The cubic root of 791015625 is about 924.8295278739.

Multiplying 791015625 by its sum of digits (36), we get a square (28476562500 = 168750²).

The spelling of 791015625 in words is "seven hundred ninety-one million, fifteen thousand, six hundred twenty-five".